Acetylene-gas burner.



No. 630,493. Patented'Aug. 8, I899. E. J. DOLAN.

ACETYLENE GAS BURNER.

(Application filed Nov. 29, 1898 (No Model.) 2 Sheets-Sheet I.

Witnesses.

iii/6% Inventor.

Attorney.

TN: NORMS PETERS co. Wm'cuumovv wAsuwa-ron. o. c

No. 630,493. Patented Aug. 8, I899.

E. J. DDLAN.

ACETYLENE GAS BURNER.

(Application filed Nov. 29, 1898.)

(No Model.) 2 Shasta-Shee 2.

Witnesses. Inventor.

Attorney.

m: NORms versus cov PHQTQ L|THQ., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

EDIVARD .T. DOLAN, OF PHILADELPHIA, PENNSYLVANIA.

ACETYLENE-GAS BURNER.

SPECIFICATION forming part of Letters Patent No. 630,493, dated August 8, 1899.

Application filed November 29, 1898. Serial No. 697,743. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD J. DOLAN, of the city and county of Philadelphia and State of Pennsylvania, have invented an Improvement in Gas-Burners, of which the following is a specification.

My invention relates to gas-burners; and it consists of certain improvements,'which are fully set forth in the following specification and are shown in the accompanying drawings.

My invention is especially adapted for burning acetylene gas and other gases rich in carbon, with which great difficulty has been experienced owing to the tendency of the supply-orifices to become clogged by the deposition of carbon. In View of the great richness of acetylene gas it is necessary to em? ploy exceedingly small supply-orifices, and for this reason there is greater tendency for these small orifices to become clogged. The tendency to deposit carbon is greater when the gas is heated than when it is at a lower temperature, and it is one of the objects of my invention to prevent the small supply orifice or tip becoming highly heated by the combustion of the gas, and thus to decrease the tendency of carbon deposition. In carrying out this part of myinvention I employa twopart burner, or one having an outer tip, at which the gas is burned, and an .inner supply-tip having a small orifice through which the gas escapes and is supplied to the outer tip. I make the inner supply-tip independ: ent of the outer combustion-tip, so that the heat of the outer tip is not transmitted directly to it. By this means the inner supplytip is kept comparatively cool, and in consequence of this the gas passing through it does not become heated and there is much less tendency to the deposition of carbon.

In addition to the clogging of the small supply-orifice by the deposition of carbon another objection exists in a unitary two-part burner from the heating of the supply-tip. This is the liability of the supply-orifice to be thrown out of line with the combustionorifice, so that the jet is not directed in a straight line through the two orifices. In a duplex burner inwhich two jets are directed upon one another, so as to form a flat flame at a distance above the combustion-orifice, this throwing the jet out of line results in displacing the flame. By keeping the supplytip cool this tendency to throw the orifice out of line is avoided. Ditficulty has also been experienced in duplex burners in forming the gaspassages in the bent or angular arms. Heretofore these passages have usually been formed by boring down through the metal from the outside at the angle of the arm, and then boring inward from the end of the arm into the passage-way first formed. This has been necessary owing to the presence of the thimble or sleeves at the base of the burnerarms, which prevents a direct boring upward from the lower end. This manner of forming the gas passage-ways is objectionable, because it necessitates the making of a lateral opening in the arm, which must subsequently be plugged.

a It is one of the objects of my invention to form the passage-ways in the angular arms without forming any lateral openings. To

this end I omit the thimble or sleeve at the end of the burner and bore the passage-ways directly from the bottom upward and from the top downward without piecing the side Walls of the arms and attach a separate thimble or sleeve after the passage-ways have been bored.

My invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevation, one-half in section, of an acetylene-gas burner embodying my invention. Fig. 2 is a similar View of a modified construction; and Fig. 3 is a view similar to Fig. 1, showing my improvement in the manner of forming the gas passageways in the arms.

I have shown my invention embodied in a duplex burner having two arms provided with tips arranged at an angle to one another, so that the jets projected therefrom will meet and form a flat flame at a slight elevation above the burner-tips.

A A are the hollow arms of the burner, branching from the cylinder B and having their ends directed toward one another.

0 O are the outer combustion-tips, carried by thimbles or supports E, supported by the burner-body and arranged at an angle to one another in the well-known manner.

D D are the inner supply-tips, carried by the arms A A and located in the rear of the tips C G, into. the rear of the passages c of which they project. The supply-tips D D are provided with gas-passages d, communicating with the passages in the arms. A A and terminating in contracted orifices d.

In the construction shown in Figs. 1 and 3 the thimbles or supports E, which carry the outer combustion-burners, are connected with the arms by pieces F, which are shown as small strips forming an integral connection between the thimbles and arms. They may,however, be separate attached pieces or brackets.

In the construction shown in Fig. 2 the thimbles or supports E are shown formed in the formation of the gas passage-ways. The

thimble or sleeve B is not formed integral with the arms A, but the latter terminate in a base H, through which the lower portion h of the gas-passages are bored upward to the elbow or angle I. The upper portions 2' are bored downfrom the upper ends of the arms to the elbow to form communication with the portions h. When the arms have been bored,

thethimble B is secured in any suitable manner over the base I-I, so as to inclose the openings therein. The base H may be provided with an annular reinforcement or ribs 3 for the attachment of the. thimble. If desired, the small portion of metal t at the base may be out 01f either before or after boring.

The details of construction which have been shown may be varied without departing from my invention.

What I' claim as new, and desire to secure 'by Letters Patent, is as follows:

1. In a gas-burner, a casting having a plurality of gas-supplying arms arranged at an angle to each other and terminating in a basepiece, said arms being provided with bores which intersect each other at the base, and a thimble internally threaded and detachably secured to the said base-piece to support the said arms and to shield the lowerends of the bores thereof, as set forth.

2. In a gas-burner the combination of a casting having two gas-supplying arm's A, A, arranged at an angle to each other and terminating at the bottom in a cylindrical basepiece .9 and having straight holes h, h, bored. through said base-piece and into the arms A said holes opening through the base-piece and terminating in a distant part of the arms so as not to perforate the metal of said arms in the direction of the length of the holes, with a thimble B internally screw-threaded at the bottom and fitting over the base-piece so as to support the burner-arms and shield the entrances to the bored holes therein.

In testimony of which invention I have hereunto set my hand.

- EDNVARD J. DOLAN.

Witnesses:

WM. A. DELANEY, E. V. SUDELL. 

